1. (a) Each pump, drain, and suction outlet shall comply with Env-Wq 1108.22(a)(1).
2. (b) Any pool in operation prior to November 1, 2005 with a single outlet or with 2 drains that are less than 3 feet apart may continue to operate provided each outlet is protected by one or more of the methods or devices specified in ANSI/APSP/ICC-7, 2013, available as noted in Appendix B.
3. (c) If suction outlets are used, a minimum of 2 outlets shall be installed at the lowest point of the pool floor.

4. (d) Each drain in a suction outlet system shall be:

   1. (1) Connected to a common pipe through a tee configuration located such that the drains are hydraulically balanced; and
   2. (2) Designed to handle a minimum of 100% of the total design circulation flow if all other drains are blocked.

5. (e) Drains shall be spaced:

   1. (1) Not less than 36 inches and not more than 60 inches apart, center to center, from each other; and
   2. (2) Evenly from the side walls.

6. (f) Drain suction piping shall:

   1. (1) Be sized to handle 100% of the circulation;
   2. (2) Have a minimum nominal pipe size of 2.5 inches when used between multiple drains; and
   3. (3) Be sized to meet the velocity requirements in Env-Wq 1109.06(f).
7. (g) Each suction outlet in a pool shall be protected as required by the VGBA, available at https://uscode.house.gov/view.xhtml?path=/prelim@title15/chapter106&edition=prelim, and its implementing regulations at 16 CFR § 1450, available at https://www.ecfr.gov/cgi-bin/text-idx?SID=1410c3f48d73aa2683c546eab89a43b5&mc=true&node=pt16.2.1450&rgn=div5.
8. (h) Each pump shall be equipped with a vacuum and pressure gauge that is separate from the pressure gauge associated with the filter.

Source. (See Revision Note #1 at chapter heading for Env-Wq 1100) #8468, eff 11-1-05; ss by #10577, eff 5-1-14 (See Revision Note #2 at chapter heading for Env-Wq 1100); ss by #13198, eff 5-1-21 (see Revision Note #3 at chapter heading for Env-Wq 1100) (formerly Env-Wq 1106.04)